Relational Expressions

A relational expression tests a specific relationship between two values. It returns a value of True if the relationship is true and a value of False if the relationship is not true. A relational expression consists of two constants, variables, or expressions (of the same type) separated by one of the relational operators listed below.

Relational operators is as follows:

Symbol	Purpose
=	Equal
# or <>	Not equal
>	Greater than
<	Less than
>=	Greater than or equal to
<=	Less than or equal to
IN-RANGE	Range check (alphanumeric, wide, and numeric)
IN-ALPHA	Alphanumeric or wide match

The IN-RANGE and IN-ALPHA relational operators can apply to wide fields provided that both strings are of the same type.

Relational expressions are often used as tests in PROIV conditional and repetitive statements. Examples:

COUNTER < 100	This expression tests the variable COUNTER to see if it is less than 100
IF BALANCE >= LIMIT THEN statement(s) ENDIF	This logic determines if a customer's current BALANCE is greater than or equal to their credit LIMIT. The statements between THEN and ENDIF are executed only if the expression BALANCE >= LIMIT evaluates to True.

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Topic ID: 520009